I tried making a custom rom using the SD format file found at mytreo.net, got stuck in a reset loop and nothing would stop it. Doing an Advance Exchange from PalmOne.
Had no problems at all creating one (several times) with the 1.23 beta, so I don't know what I could possibly have done wrong.

Nope, nobody has sent me any files. A couple of folks posted links to other discussions on the subject, but I've been so busy lately that chasing off on a potential wild goose chase just didn't make my to-do list.